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ISAGGHARIFIGATION 0F STARGH.

No.v 270,260."

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.L maw UNITED STATES I PATENT OEEICE.

FLAVIUS I. STIKER, OF TORONTO, ONTARIO, CANADA.

sACcHARlFiCA'l-ION V0F sTARcH.

SPECIFICATION forming part of Letters Patent No. 270,260, dated January 9, 1883.

Application tiled August 26, 1882. (No model.) I i To all 'whom 'it may concern Beit known that I, FLAVIUS I?. STIKER, a. citizen ottheUnited States, residingin Toronto, in theProvinceofOntario and Dominion ofCanu ada, have invented certain new and useful lmprovements in the Sacchariticatioul of Starch, ot' which the following is a specification.

It is now well known that the saccharitication of starch by means of dilute acids is quickenedunder the influence ot' pressure, and consequently higher temperature, several devices, usually called t closed converters,7V having been invented for that purpose, all of which have one common defect, which is, that in converters a little large, that part of the'acidulated starch-liquor which comes in contact with the heated parts of the apparatus becomes saccharitied and caramelized before other portions are saccharitied. In the open converters without high pressure the experience ofthe grapesu gar manufacturer consists in the rule that the starch with Water is allowed to iiow in a small stream in boiling water containing dilute sulphuric acid until by applying the proper test it is Vfound that the saccharication is completed to the desired point. This point is not usually reached until some time after the tlow of the entering starch-liquor has been stopped. 1t

will be seen that the older process is still more defective, in fact the conversion under pressure having been invented as an improvement, and it has proved, as expected, a great step in advance.

My invention consists in making the process continuous by means which will be more clearly hereinafter shown by reference to the draw-V ings, in which- Figure lis a vertical central section through the apparatus. Fig. 2 is a plan or' top view. Fig. 3 represents a horizontal section through line x w ot' Fig. l, and Figs. 4 and 5 are enlarged side elevations of the test-cocks J.

A represents the body of the apparatus.

I admit the acidulated starch-liquor through the opening a of the siphon B, where a steamjet B takes it and forces it through pipe C into the annular vessel D. The chemical transformation begins at once in the steam-Siphon B, and is continued inpipe C and in theannular vessel D, where 1t is liquetied, or partly so,

to prevent clogging in the balance of the apparatus; but the starch, dilute acid, and steam may be introduced separately, it'. desired. From the annular vessel D the acid'ulated liquefied or partly-hq netted starch passes through the overliow or other suitable opening D into a suitable number otA helical troughs or gutters, E', E2, E3,E4, and E5. the number, style, and disposition of which may be considerably varied. For instance, a pipe may be used in their place, which may be perforated on its upper portion, if desired, and the form of the coil or its equivalent may be varied, so long as the starch-liquor is kept exposed for a sufficient length of time in thin sheets or bodies to the action of dilute acids, heat, and, when required, of pressure, (as the process may be carried on Without pressure, although l do not think with as good results,) to eti'ect the conversion'or saccharitcation to the point desired, as, according to the time of action, temperature, pressure, and quantity of acid used, dextrine, glucose, or grape-sugar may be made, or amixture of them. Afterhavingpassed overthe last helical` gutter or tube the product iiows out into the bottom ofthe apparatus, where it can still be subjected to further action, if desired, by the steam-coil F, after which it may be discharged through any suitablevalve or stop cock, Gr. It will be noticed that as the starch-liquor` passes down through the first helical trough it moves from the circumference toward the center and then down through a suitable conductor, H, to the outer part of the next helical trough, and so on through the series; but this arrangement may be revised or changed, if desiredfwithout altering the nature ot' my invention.

A glass orother gage, H', may be placed on the apparatus to indicate the depth of the liquor in the bottom ofthe same. It should also be provided with suitable safety-valves, I, and

IOO

ing the starch-liquor through a closedl oo nverterin a trough or pipe. or an)r suitable passage of sufficient length to insure the saccharif ication ofthe starch during said passage, substantially as described.

2. A closed converter having aconlinuous passage-Way through it ot' the required length to prolong the passage ot' the starch-liquor and expose it to the heat for a sufficient length of time to insure its saccharilication during such passage.

3. A. continuous converter, in which the starch-liquor or acidulated starch and steam are in actual contact during the passage ot said starch-liquor through troughs or pipes within it ot1 sutticient length, as described, to insure the required length ot' time for the sacchariiicati'on ofthe starch during its passage under such conditions, substantially as specified.

4. The Vcombination ofthe converter A, siphon B, pipe U, steam-pipe J', and its testcocks J, and connecting pipes with a vessel, l), overoW-pipe D', and helical conducting troughs or pipes E E2 E3 E E5, substantially as and for the purposes described.

y FLAVIUS P. STIKER.

Witnesses:

J AMES SANGSTER, J. M. CALDWELL. 

